Bug#13233

  select distinct char(column) fails with utf8
ctype_utf8.result, ctype_utf8.test:
  Adding test case
sql_yacc.yy:
  Adding new syntax.
item_strfunc.h:
  Fixing wrong max_length calculation.
  Also, adding CHAR(x USING charset),
  for easier migrating from 4.1 to 5.0,
  according to Monty's suggestion.


sql/item_strfunc.h:
  Bug#13233
  select distinct char(column) fails with utf8
  Also, adding CHAR(x USING charset),
  for easier migrating from 4.1 to 5.0.
sql/sql_yacc.yy:
  Adding new syntax.
mysql-test/t/ctype_utf8.test:
  Adding test case
mysql-test/r/ctype_utf8.result:
  Adding test case

1 files changed, 6 insertions, 3 deletions

diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index b01d75b8e02..5525c046b95 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -444,12 +444,15 @@ public:
 class Item_func_char :public Item_str_func
 {
 public:
-  Item_func_char(List<Item> &list) :Item_str_func(list) {}
+  Item_func_char(List<Item> &list) :Item_str_func(list)
+  { collation.set(default_charset()); }
+  Item_func_char(List<Item> &list, CHARSET_INFO *cs) :Item_str_func(list)
+  { collation.set(cs); }
   String *val_str(String *);
   void fix_length_and_dec() 
   { 
-    collation.set(default_charset());
-    maybe_null=0; max_length=arg_count;
+    maybe_null=0;
+    max_length=arg_count * collation.collation->mbmaxlen;
   }
   const char *func_name() const { return "char"; }
 };